Attachment

Deliberation structure and issues for examination by the “Nuclear Facility Investigative Taskforce in the Niigataken Chuetsu-oki Earthquake” under the Nuclear
and Industrial Safety Subcommittee of the METI Advisory Committee for Natural Resources and Energy
Subcommittee /Working Group

Issues for
examination

Specific issues

Working Group on 1.In-house fire-fighting(1)Examining TEPCO’s response and tasks in relation to this earthquake, and exploring an in-house fire-fighting system

in-house
fire-fightingand future challenges for nuclear energy operators(2)Exploring an in-house fire-fighting system and fire-fighting facilities for nuclear energy operators

andinformation liaison 2.Information
liaison (1)Examining TEPCO’s response and tasks concerning radiation leakage, and exploring nuclear energy operators’ response/ provision in thesystem
withinthe system and tasks at the time of radiation leakage
Niigataken
plant operator(2)Exploring an information liaison system for nuclear energy operators
Chuetsu-oki
3.Initialactionand (1)Examining TEPCO’s initial action in this earthquake, and exploring tasks concerning the government’s initial response
Earthquake

preparation system inemergency

Hirotada 4.Information

Ohashi,Graduate

SchoolofEngineering,

3rd meeting: October 11
4th meeting: November 14
5th meeting: December 7

system (including an investigation into facilities required for making the initial response system function properly)

provision (1)Investigating and exploring TEPCO’s information provision to local governments and residents

to local governments (2)Investigating and exploring the governments’ information provision to local governments and residents
and residents(3)Examining and exploring easy-to-understand press releases by the government and TEPCO (conveying a sense ofsecurity and reducing adverse effects based on misunderstanding)

University of Tokyo
Subcommittee

1st meeting: August 27
2nd meeting: September 20(2)Exploring a liaison system for local governments, national government and nuclear energy operators (including a system
for gathering information that facilitates liaison)(Project Manager)
Professor

Meetings convened

on 1.Examining the research data of relevant organizations on this earthquake, observation data of the seismic motions and survey data used as designanti-quake

basis to determine why the seismic motions observed in this earthquake exceeded the design-basis seismic motions at the foundations of reactor

structural designs

buildings at the power station
2.Impact of thisearthquake on thesafety, and verifying their integrity

Professor emeritus
Katsumasa Abe of

Kashiwazaki-Kariwa
Nuclear Power Station(2)Examining the earthquake’s impact on equipment and piping that are deemed important in terms of anti-quake safety(The Working Group on nuclear plant administration and assessment of facility integrity is in charge of assessing theintegrity of equipment and piping that received force beyond the elastic region.)

Tokyo(3)Examining the earthquake’s impact on other facilities (the facilities that the Working Group on in-house fire-fighting andinformation liaison / provision in the Niigataken Chuetsu-oki Earthquake has earmarked for the enhancement ofanti-quake resilience.)
3.Issues that should bereflected to futureanti-quake safetyassessment of theKashiwazaki-Kariwa
Nuclear Power Station

13th meeting: August 24(1)Examining the earthquake’s impact on plant buildings / structures that are deemed important in terms of anti-quake(Chairman)

the University of(Subcommittee)(*)<WG on plant structures>
5th meeting: September 13
6th meeting: October 23
7th meeting: November 27
8th meeting: December 25<Joint WG on earthquakes, tsunami,(1)Examining the research data of relevant organizations on this earthquake to identify which undersea active faults should geology and subgrade>
1st meeting: October 12
be reflected in defining the level of an earthquake that forms the basis of anti-quake designs(2)Examining the observation data of seismic motions in this earthquake, and findings on the investigation into why theobservation data exceeded the design-basis figures at the foundations of reactor buildings at the power station, so as toidentify issues that should be reflected in defining the design-basis seismic motion(3)Examining the analysis results of seismic data observed at plant buildings in this earthquake, to identify issues thatshould be reflected to anti-quake safety assessment of buildings, structures, equipment and piping that are deemed
important in terms of anti-quake safety(4)Examining the findings of the study into the earthquake’s impact on facilities deemed important in terms of anti-quake
safety at the Kashiwazaki-Kariwa Nuclear Power Station, to identify issues that should be reflected to theimprovement of anti-quake performance for plant facilities(5)Examining the findings of the impact study on other facilities, to identify issues that should be reflected to the anti-quake
performance of plant facilities

2nd meeting: December 5
3rd meeting: December 25(*)Existing Subcommittee or WG
before the Chuuetsu-oki Earthquake
occurred

(6)Summarizing the anticipated level of earthquakes and seismic motions that should be reflected to future anti-quake
safety assessment at the Kashiwazaki-Kariwa Nuclear Power Station, anti-quake safety assessment and anti-quake
performance improvement measures for the power station’s facilities that are important in nuclear safety, and issues
associated with anti-quake performance improvement for other facilities
4.Summarizing the insight obtained from this earthquake and examining issues to be reflected to other nuclear power stations from the perspective ofanti-quake safety assurance for nuclear facilities
Working Group on 1.Operation management (1)Assessing the operation management measures the utility implemented immediately after the earthquake, identifying
nuclearplant
administration andassessmentof

immediately after an tasks that should be addressed, and reflecting the knowledge to manuals as required
earthquake
a.Confirming the status of automatic shutdown (status of first scram, neutron flux fluctuations, and the operation /standby state of safety systems)(WG)
1st meeting: September 4
2nd meeting: October 2
3rd meeting: November 1

facility integrityb.Confirming the relevance of operation proceduresc.Examining the operation management that led to the iodine detection in the exhaust stack at Unit 7

4th meeting: December 11(Project Manager)

d.Examining non-conformity management regarding the release of leaked water at Unit 6<Sub-WG>

Professor
Sekimura,

Naoto 2.Assessment of facility (1)Grasping the status of plant facilities, examining what inspections are needed, and assessing the plant operator’s facility
integrity
inspection plan and its outcome
Graduate School of(2)Examining the method for assessing facility integrity, and exploring judging criteria on the need for repair workEngineering,(3)Examining the results of inspections and assessment, to explore the method for repair work
University of Tokyo(4)Identifying items that should be reflected to guidelines and criteria to be applied in individual stages of assessment

1st meeting: November 12
2nd meeting: November 27